background image

11

LEGEND 

Fig. 13 —Typical Refrigerant Piping for MDC

EXV*

Expansion Valve

HEX

Heat Exchanger

PS

Pressure Sensor

SV*A-*, SV*B-*, 

SVM*, SVP

Solenoid Valve

Tm

Temperature Sensor

Check valves

PS3

Tm2

SVP

EXVA

Tm3

SV1A-1

SV1B-1

SVmA-n

SVmB-n

HEX2

separator

Gas/Liquid 

Tm3

Tm1

Tm2

SVMC

EXVB

EXVC

SVME

SVP

EXVA

SV1A-1

SV1B-1

SVmA-n

SVmB-n

HEX1

HEX2

Check valves

PS2

PS1

PS3

IDU Side

ODU Side

MDC

Summary of Contents for 40VMD 008

Page 1: ...1 Understand the signal words DANGER WARNING and CAUTION DANGER identifies the most serious hazards which will result in severe personal injury or death WARNING signifies hazards that could result in...

Page 2: ...required to service the equipment Seal circuits being serviced and charge with dry nitrogen to prevent oil contamination when timely repairs cannot be completed Failure to follow these procedures may...

Page 3: ...fasten the connector between flexible condensate pipe and MDC condensate Condensate connection 2 Reducer for smaller pipe diameter only for size 018 unit PQE connection wire No of Ports 3 Connect out...

Page 4: ...o determine if shipping screws are to be removed Remove screws as directed Step 2 Position the Unit Install the unit in a location that meets the following requirements Allow adequate space for instal...

Page 5: ...e acceptable refer to the refrigerant piping allowable limits in the manual Refrigerant piping connection between indoor units should be performed once the units are secured at their respective instal...

Page 6: ...6 Connecting Liquid Pipes to the Indoor Unit LEGEND Table 7 Combination Table INDOOR UNIT kBtu h LIQUID SIDE in GAS SIDE in 5 7 9 12 15 1 4 1 2 18 24 30 36 48 54 3 8 5 8 72 3 8 7 8 96 3 8 7 8 a c b L...

Page 7: ...ecommended nitrogen flow rate is approximately 1 76 ft3 h This is brazing sequence for Note that the flow capacity through this system is limited so you cannot blow through the lines with a high flow...

Page 8: ...C and the Y joint Table 8 Piping Between the MDC and Y Joint PIPING BETWEEN MDC AND SUB MDC 3 pipes are used to connect the main MDC and the sub MDC Selection of the Sub MDC should follow the requirem...

Page 9: ...to a Single Sub MDC Fig 12 Connecting Main MDC to Two Sub MDCs Main MDC unit Outdoor unit Indoor Sub MDC1 Sub MDC2 unit Indoor Indoor unit High pressure pipe pipe Low pressure Liquid pipe High pressu...

Page 10: ...13 For a typical example of running the refrigerant pipes see Fig 14 INDOOR UNIT CAPACITY kBtu h CONNECTION DIAGRAM 72 73 108 109 168 a MDC Unit b Sub MDC Pipe Accessory c Pipe 3 4 d Cut Here e Pipe 7...

Page 11: ...r PS Pressure Sensor SV A SV B SVM SVP Solenoid Valve Tm Temperature Sensor Check valves PS3 Tm2 SVP EXVA Tm3 SV1A 1 SV1B 1 SVmA n SVmB n HEX2 separator Gas Liquid Tm3 Tm1 Tm2 SVMC EXVB EXVC SVME SVP...

Page 12: ...O 1 Sub MDC Unit MDC Indoor NO 1 Indoor NO 2 Indoor NO 3 Indoor NO 4 Indoor NO 5 Indoor MDC Outdoor or Sub MDC Outdoor Sub MDC NO 1 Sub MDC Unit 6 5 4 3 1 2 Main MDC Unit Indoor Unit NO 3 NO 4 Indoor...

Page 13: ...e outdoor unit should be in the closed position throughout the refrigerant piping process Failure to follow this procedure may result in equipment damage OUTDOOR MODEL kBtu h HIGH PRESSURE SIDE in LOW...

Page 14: ...pe 1 1 8 g ODU Pipe Accessory h Pipe 1 3 8 k Pipe 1 5 8 WARNING Electrical shock can cause personal injury and death Disconnect power supply before making wiring connections There may be more than one...

Page 15: ...his might cause disturbance on the controls side Use 2 core stranded shielded twisted pair communication wire Make sure the control wire does not form a closed loop The control wire is polarity sensit...

Page 16: ...Indoor unit 5 Indoor unit 6 Outdoor Unit Centralized Controller No N Sub MDC unit 1 Touch Screen Wired Controller HA HB HA HB HA HB HA HB HA HB P Q P Q P Q P Q P Q P Q wired controller HA HB To No 1...

Page 17: ...ommunication bus 75 16 250 5 75 16 M O M O CN10 CN12 CN51 TRANS OUT TRANS IN CN53 CN55 S3 CN41 EXVA T3 CN1 CN45 T1 T2 CN43 CN44 690 690 OXH 5HG OXH 5HG UHHQ XT1 1 M I 2 M I CN13 UHHQ URZQ 5HG KLWH OXH...

Page 18: ...1 DSP2 CN53 CN52 CN51 EXVA EXVB EXVC CN27 WATER T3 CN25 CN20 T1 T2 HOORZ ODFN OXH 5HG OXH 5HG OXH 5HG UHHQ UHHQ UHHQ UHHQ UHHQ UHHQ URZQ 5HG KLWH OXH URZQ 5HG KLWH OXH URZQ 5HG KLWH OXH URZQ 5HG KLWH...

Page 19: ...e as the actual quantity DISPLAY DSP1 AND DSP2 DISPLAY DEFINITION S E0 Communication error with outdoor unit S E1 T1 temperature sensor error S E2 T2 temperature sensor error S E3 T3 temperature senso...

Page 20: ...7 the switch must be set to OFF OFF or ON ON v POSITION 1 2 S1 IDU PIPES SETTING OFF OFF Normal Mode default ON ON 2 Ports Twinned Together Fig A S1 S3 S5 and S7 Settings POSITION 1 2 S3 IDU PIPES SET...

Reviews: